Improvement in wrenches



JOSEPH N. NEW'ELL. improvement in Wrenches; N ,'114,7 03 PatentedMy9,187!

I %%iwvwzw o 1 m UNITED STAT S PATENT OFFICE.

JOSEPH N. NEW'ELL, OF ADRIAN, MICHIGAN.

IMPROVEMENT IN WRENCHES.

v Specification forming part of Letters Patent No. ll4,703, dated May 9,1871; antedated April 29, 1871.

To all whom it? may concern:

Be it known that I, J OSEPH N. NEWELL, of Adrian, in the county ofLenawee, and in the State of Michigan, have invented certain new anduseful Improvements in Wrenches; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawing, and t0 theletters of referencemarked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangementof a wrench, as will be hereinafter fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, whichrepresents a longitudinal vertical section of my wrench.

A represents the stem of the wrench, provided at one end with the handleB and at the other with the stationary jaw O. The upper side of the stemA is provided with an offset at a, making the outer end or the portionwhere the sliding jaw D moves thicker than the re mainder of the stem.The entire upper surface of the stem A is made concave or provided witha semicircular groove running lengthwise from end to end of the stem.

The sliding jaw D is provided with a lip or tongue, I), which fits inthe concavity of the stem and extends in front of said jaw, so as toform 'a flat surface on the upper side of the stem between the jaws. Therear side of the sliding jaw D is shaped as shown in the drawing, andprovided with a curved T- shaped groove, d, in which is placed a smallflattened roller, 6, upon the front end of a long screw, E. This screw Epasses through a block, G, pivoted between two ears, f, above the stem,said ears being attached in any suitable manner to the stem at aconvenient point between the offseta and the handle B.

To the under side of the block G, at the front end, is attached aspring, H,which extends toward the handle between the ears ff, and itsrear end resting in the groove or concavity on the stem. The action ofthis spring is to throw the front end of the screw downward, which hasthe effect of moving the sliding jaw toward the stationary one as theroller 6 upon the end of the screw moves in the curved groove on saidsliding jaw.

. By pressing down upon the knob at the rear end of the screw E thesliding jaw is moved away from the other. The sliding jaw must of coursefirst be set nearly to the distance re quired by turning the screw E.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The sliding jaw D, provided with the lip 0r tongue I) and the curvedT-shaped groove d, substantially as and for the purposes herein setforth.

2. The screw E, passing through the pivoted block G and provided on itsfront end with the 'roller 6, substantially as and for the purposesherein set forth.

3. In combination with the pivoted block G and screw E, the spring H,arranged to operate substantially as and for the purposes herein setforth.

4. The combination of the stern A with handle B and stationary jaw O,the slidingjaw D, screw E, block G, and spring H, all constructed andarranged substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this4th day of October, 1870.

JOSEPH N. NEWELL.

Witnesses:

FRANK HARWOOD, O. B. J OHNSON.

